Roger, weighing around 200 pounds and standing tall at 6.5 feet, can crush metal buckets with ease.While Roger's arms look remarkably swole, it's his legs that pose a real threat to anyone dumb enough to tangle with him. Barnes, who works in the sanctuary, said a well-placed kick from a red kangaroo can be lethal.

A former outback tour guide, Barnes quit his job to found the Kangaroo Sanctuary in 2005. He became a surrogate parent for 200 orphaned kangaroos.

Tahnee Barns, who works at the sanctuary, assured Mashable Australia that Roger's size was completely normal for an alpha red male kangaroo.

"He's still growing so he'll get bigger," she said. "The bigger they are, the more likely they are to win the females."